Hi Player
Yea, after you lose your capital you can’t collect any dough until it’s liberated.
It could be all Inf. or all Tanks, or any combination.
Lets here what you have to say
In most scenarios, 6 infantry would be my pick for defense.
If I lack aa guns and the enemy is ready with a lot of air, then I might include an aa gun or guns.
If I’m likely retreating from the position (but it won’t fall immediately), then some mech or air might be desirable.
Depends a lot on how serious the threat is.
Pure defense, nothing else considered, 6INF.
But it is of course like Wheatbeer said; depends a lot on the situation…
If defending a not-to-be-given-up location while still have to be building up for counterattacks, might build 3ART + 2INF instead.
Etc. etc.
All infantry - best defense rating for the money and longest staying power due to a greater number of them.